Sameroom - Shared Channels Across Slack Teams

If you'd like to share a channel in your Slack team with another company on Slack, you can create a Sameroom Portal and share its URL with the other team.

Once they connect, you can just chat in the shared cahnnel. No need to switch between Slack teams, worry about data ownership (Sameroom replicates messages and files across the shared channels), or asking the other side to invite more of your people.